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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 379 (Engine Controls Self-Diagnostics - 3.4L) >> Diagnostic Tests >> DTC P0103: MAF Sensor Circuit - High Frequency >> Test Description

Test Description

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The numbers below refer to the step numbers in the diagnostic procedure.

  1. 3  - This step tests for Electromagnetic Interference (EMI) on the signal circuit of the MAF sensor. A frequency reading with the MAF sensor disconnected may indicate an EMI related fault or a poor connection at the PCM. Disconnecting the MAF sensor may set additional related DTCs.
  2. 4  - This step determines if incorrect harness routing has caused this DTC to set.
  3. 5  - This step determines if water intrusion has caused this DTC to set.
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